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Finding the Fourth Proportional to 256,878.65, 354,635.04 and 154,929.81

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Solution

The fourth proportional to 256,878.65, 354,635.04 and 154,929.81 is: 213,889.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,878.65 : 354,635.04 = 154,929.81 : x
  2. Step 2: Convert to fraction form
    256,878.65/354,635.04 = 154,929.81/x
  3. Step 3: Cross multiply
    256,878.65x = 354,635.04 × 154,929.81
  4. Step 4: Simplify right side
    256,878.65x = 54,943,539,366.54
  5. Step 5: Solve for x
    x = 54,943,539,366.54/256,878.65
  6. Step 6: Final answer
    x = 213,889.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.